Sash latch



Aug. 18, 1925. 1,550,546 J. HouslNGER, JR

SASH LATCH Filed July 14. 1924 l 3747; 1451195565: @wen 0115i?? er@ JJM/KM@ M1/ff@ JOHN noUsINGER, Jn.,

PATENT FI CE.

0F CHICAGO, ILLINOIS.

SASH LATCH.

appiicatmnA nied AJuly 14,

TorafZZ whom t may concern.'

Be it known that I, JOHN .HoUsiNenR, J r., a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Sash Latclies, of which the following isa full, clear, concise, and lexact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in sash latches, more particularly sash latches for permitting a limited opening of the window, a's for ventilation, and for preventing opening therebeyond and thereby 4surreptitious entry through the window.

An yobject of the invention is the Vprovision of a generally improved, simpli-iied and inexpensive device having suoli cooperation with the sash that it receives a maximum lbracing therefrom in its set position, and

reduces the leverages of imposition ofl prying and the like stresses to a minimum.

Further objects are to prevent releasing of the bolt or latchfrom the outside, and to lprovide, where desired, for confining the opening of the window permitted by the latch to the upper sash sok that said opening will be as remote as Apossible from such things in the room as might otherwise Vbe .reached and withdrawn by an limplement through an opening at the bottom.

A still further object is to avoidalt'eration of the sash and setting and to minimize the difficulty of attachment of the device.

The inventionV is illustrated in 'the accompanying drawings, in which:

Fig. 1 isv a fragmentary perspective view, partially in section, of the upper and lower sashes of a window showing an embodiment of my invention in connection therewith; 1

Fig. v 2 Ais a perspective view of thek lower sash showing the latching member carried thereby Vin released position,

Fig. 3 is a detail section'through the latch-` i-ng member .showing one way of preventing releasing ofthe latch Vfrom the outside;

fFig. 4 is a perspective-view of the upper and :lower sashes of a windowv `showing an-V other embodiment of the invention;- and f y Fig. 5 is asimilar View of another embodiment.

In Figs. i1 and 2, 5 designates the :lower sash and '6 the fup'per sash of the window.

`The sashes yare shown olf the conventional type and are slidable in the Window iframe i924. serial No. 725,789.

8 in the usual or any preferred manner. The vertical sides or stiles of the frame 8 have the usual or any suitable vertical ways 9` separated into ways for the respective sashes by the usual vertical intermediate raillO.

lThe window panes of the particular strucmember comprises a pair of latching arms` 14 and I5. These `latching arms are preferably 'in the form of fiat plates or bars and are hinged at one end upon apin or pintle 16 as by rolling or wrapping about the pin or pintle to form knuckles 17. y

The rmounting armk or Lbase plate 18 is also preferably in the form of `a fiat plate or bar and it is scarfed at its upper end and the upwardly extending intermediate portionis rol-led back at 20 about the intermediate portion of pin 1G between knuckles 17 to hingedly connect it to arms 14 and15. The base plate 18 is fastened by screws 21 adjacent the frame 8 to theiiiner surface of sash 5 adjacent its upper edge, with the hinge adjacent the linner corner ofl said upper edge.Y The positioning of the hinge allows the latchiiig jarms'14 or 15 to lie in generally lflat engagement with the-upper edge or surface of sash 5 and transversely thereacross when the latch is set.

Mounted upon the upper sash 6 isal stop bracket 24 offset at 25 to overlie the end of tl-ac arm 14. or l5 which projects from the adJa'cent `side of sash 5. The stop 24 is secured to the sash 6 as by means of suitable screws 26, and it is so spaced or -distanced from the upper edge of sash 5 that the desired opening of the window is permitted, and when the maximum operif ing is reached the offset end 25 .of stop 24 engages the projecting end of the arm 14 or 115, as the case may be (the arm 15 being shown in locking position in Fig. 1), and prevents further vopening of the window. 4The amount of opening usually permitted is such Las to permit proper ventilation without permitting surreptitious entry through the opening. WYhen the locking arms 14 and k15 are in nonloc'king position, the sto-p 24 is adapted to travel between the sashesand permit complete or any desired amount of window opening in the K* usual manner. It should be noted that when the .latchingarm is set, the upper edge off sash 5 braces substantially the entire length of the arm, the projecting end of the latching arm, which cooperates with the stop, being relatively short and the leverages of imposition of prying` stresses and the like are reduced to a minimum. Thus, latching arms and stop brackets of relatively light weight will provide great strength against unauthorized forcing of the window open beyond the opening at which the stop is brought into action.

rThe outer edge of each arm 14 and 15 is notched or scarfed at 28 and a stop bracket 29 is secured by screws 30 to the inner face of the vertical stile of the frame 8. The stops 24 and 29 may be identical to simplify manufacture, distribution and installation.

The vertical position of stop 29 on the frame is such that, when the lower sash is closed, the offset end 32 will lie in the path of swinging movement of the slot 28 in the adjacent latching arm, to permit said arm to be swung down into the position shown in Fig. l. In such position, the offset end 32 of the stop overlies the shoulder 33 at the lower end of slot 28 and, by cooperation with said shoulder, limits the upward movement of the lower sash. The clearance necessary to permit the latching arm to swing past the stop is relatively slight so that the slight upward movement of the lower sash is therefore preferably insufficient to lift the lower edge of the lower sash above the usual batten provided along the frame and therefore insufficient to create an opening between the lower edge of the lower sash and the frame.

With the parts set as shown, the limited opening of the window is confined to downward movement of the upper sash until the stop 24 engages the projecting arm 15. By swinging the arm 14 out to move the shoulder 33 out of the vertical plane of the offset stop edge 32, the limited opening` may be secured at the top or bottom of the window, as desired. In use the latching arm which cooperates with the stop member on the frame is arranged adjacent the frame for proper cooperation with said stop member.

.For the purpose of adapting the device to sashes of different thicknesses, the latch- .ing arm 14 may be of greater length than the latching arm 15, as shown. Then used with a sash of lesser thickness, the device is arranged at the left-hand side, for eX- ample, of the window, as shown in Fig. 1, und the arm is used to limit the opening of the window, while the arm 14 is used to prevent opening of the lower sash. When used with a sash of greater thickness, the device is arranged at the opposite side of the window so that the arm 15 will cooperate with the frame stop to prevent opening of the lower sash, while the arm 14 will be swung into position across the upper edge of the lower sash to underlie stop 24 and limit opening of the window.

To prevent releasing the lock from the outside by inserting an implement between the upper and lower sashes and swinging the arm 15 or 16 back out of latching position, relatively stiff spring arms are secured to the base plate 18 as by means of the screws 2l and are looped about the knuckle of the device and turned in at their free ends for engagement at 42 with the locking arm 15. The engagement at 42 prevents surreptiti'ous release of the lock from the outside. At the same time, however, the free end of the element 40 is adapted to be conveniently sprung into register with the slot or opening 43, as shown in dotted lines in Fig. 3, whereupon the latching arm may be swung out of latching position over the element 40.

In Fig. 4, a single latching arm 45 is provided with slots or scarfs 46 and 47 in its opposite edges. In order to simplify matters the frame 8 and its stop 29 have been omitted from Fig. 4 since they are clearly illustrated in Fig. 1. It, therefore, should be understood that when reference is made hereinafter to the frame and its stop that I refer to them as illustrated in Fig. 1. The cooperation with the stop bracket 24 is substantially as before, and in this case slot or scarf 46 permits swinging the latching arm into position for cooperation with the stop on the frame when the device is arranged at the left-hand side of the window, while the slot 47 provides for similar cooperation with the frame stop when the device is arranged at the right-hand side of the window. This embodiment is particularly adapted for use at either or both sides of the window.

In the embodiment shown in Fig. 5, the single latching arm 50 is adapted to be swung into and from latching position upon the upper edge of lower sash 5 for cooperation with the bracket stop 51 on the ripper sash 6. This embodiment, as the preceding one, is adapted for use at either or both sides of the window. All provision for latching the lower sash against raising is, however, eliminated so that the desired window opening may at all times be secured either from the top or from the bottom, as desired. This is a satisfactory embodiment of the invention for use where there is no necessity nor desire to prevent raising of the lower sash and it embodies the strength and operating action of the other embodiments and its simplicity is even more pronounced.

In the embodiment shown in Fig. 5, I have shown an alternative form of means for preventing releasing of the latching arm from the outside. It comprises a latch having a laterally turned end 55 and preferably provided with a joint 56 in its shank which permits the head 55 to be swung into position to overlie the arm 50and thereby hold it against being swung up from latching position from the outside as by the insertion of an implement up between the sashes. Swinging of head 55 out of engagement with arm 50 permits convenient releasing of the lock from the inside. The joint in the shank of the latch is preferably tensioned to prevent its being jarred out of latching position and to make its releasing movement diiiicult.

I claim:

l. The combination with the upper and lower sashes of a window of a sash latch comprising a pair of'flat hingedly joined members, one for attachment to the lower sash with the hinge joint between it and the other member adjacent the inner corner of the upper edge of said lower sash, and the other having latching position flat across the upper edge of said lower sash with its free end projecting beyond the outer corner thereof, and a stop secured to the upper sash for engagement with the projecting end of said member and adapted to travel between the sashes to permit complete or any desired opening of the window when said latter member is -in a released position.

2. The combination with theupper and lower sashes of a window of a sash latch comprising a pair of hingedly joined members, one for attachment to the lower sash with the hinge joint between it and the other member adjacent the inner corner of the upper edge of said lower sash, and the other having latching position flat across the upper edge of said lower sash with its free end projecting beyond the outer corner thereof, and a stop secured to the upper sash for engagement with the projecting end of said member and adapted to travel between the sashes to permit complete or any desired opening of the window when said latter member is in released position, said hingedly joined members comprising fiat plates hinged upon a common pintle, and said stop comprising a fiat plate having its latching edge offset toward the lower sash.

3. Thev combination with the upper and lower sashes of a window, of a sash latch comprising a stop secured to the inner face of one of the side stiles of the upper sash and adapted to travel between the sashes as same are opened past said stop, and a pair of fiat hingedly joined latching bars, one for attachment to the inner face of the upper stile of the lower sash, and the other adapted to be swung into latching position flat upon the upper edge of said stile with its free end projecting into the path of movement of said stop member and to be swung into unlatched position down along the inner face of the upper stile substantially parallel with said first bar.

4. The combination with the Lipper and Vto be swung into latching position fiat u Jon the uppersurface ofv said stile with its tree end projecting into the path of movement of said stop member and to be swung into unlatched position down along the inner face of the upper stile substantially parallel with the iirst bar, said stop having its lowerend offset for latching engagement with the projecting end of said latching bar, said latching bar being braced from its hingedly an chored end at the outer corner of the upper stile to the projecting end at theopposite corner of said stile byits at engagement upon the upper surface of said stile.

5. In combination, a window frame, upper and lower window sashes, la stop on the upper sash, a stop on the frame, and a latch-` ing arm hinged to the lower sash and adapted to lie across the upper edge thereof into projecting position underlying the stop on the upper sash to limit the opening of said upper sash, said arm having a lateral shou1- deradapted to underlie the frame stop to prevent opening of the lower sash.

6. The combination with the upper and lowersashes of a window, of a sash latch comprising a pair of hingedly joined meme bers, one for attachment to the lower sash with the hinge joint between it and the other member adjacent the inner corner of theupper vedge of said lower sash and the other having vlatching position flat across the upper edge of said lower sash with its free end projecting beyond the outer corner thereof,

a stop secured to the upper sash for engagement with the projecting end of said member and adapted to travel between the sashes to permit complete or any desired opening of the window when said member is in released position, a window frame,and a stop on said frame, the hinged latching member having a lateral scarfed edge to be swung into locking engagement with the frame stop to prevent opening of the lower sash.

7. Incombination, a window frame, upper and lower sashes, latching means on one of said sashes and said frame, and co-operating latching means on said other sash adapted to be moved into engagement with the latching means on said sash and to be moved out of engagement therewith into engagement with the latching means on the said frame. f j v In witness whereof I hereunto subscribe my name this 10th day of July, 1924.

JOIIN HOUSINGER, JR. 

